RE: [xsl] XSL2 string result from XSL1 template

Your template is returning a sequence of text nodes. The simplest way to
convert this to a single string is:

<xsl:variable name="fulltarget" as="xs:string">
  <xsl:value-of>
    <xsl:call-template name="encode-url">
      <xsl:with-param name="str"
select="concat($urlprefix,'docs/',$book,'/',$subf,'#',$jid)" />
    </xsl:call-template>
  </xsl:value-of>
</xsl:variable>

the effect of the xsl:value-of instruction is to convert the sequence of
text nodes into a single text node.

Michael Kay
http://www.saxonica.com/

-----Original Message-----
From: Trevor Nicholls [mailto:trevor(_at_)castingthevoid(_dot_)com] 
Sent: 14 April 2009 12:40
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] XSL2 string result from XSL1 template

I am running an XSL 2.0 stylesheet which includes some 
ubiquitous XSL 1.0 stylesheets which provide some standard features.

The variable definition here gives an error at runtime:

  <xsl:variable name="fulltarget" as="xs:string">
    <xsl:call-template name="encode-url">
      <xsl:with-param name="str"
select="concat($urlprefix,'docs/',$book,'/',$subf,'#',$jid)" />
    </xsl:call-template>
  </xsl:variable>

The error is XTTE0570: A sequence of more than one item is 
not allowed as the value of variable $fulltarget


OK, I understand the error, and I could write an XSL 2 
version of the encode-url template that would return a single 
string, but how would I modify the CALLING stylesheet to work 
with what I already have?

The called template looks like this ($safe, $ascii, $latin1 
and $hex are what you would expect):

  <xsl:template name="encode-url">
    <xsl:param name="str"/>   
    <xsl:if test="$str">
      <xsl:variable name="first-char" select="substring($str,1,1)"/>
      <xsl:choose>
        <xsl:when test="contains($safe,$first-char)">
          <xsl:value-of select="$first-char"/>
        </xsl:when>
        <xsl:otherwise>
          <xsl:variable name="charval">
            <xsl:choose>
              <xsl:when test="contains($ascii,$first-char)">
                <xsl:value-of
select="string-length(substring-before($ascii,$first-char)) + 32"/>
              </xsl:when>
              <xsl:when test="contains($latin1,$first-char)">
                <xsl:value-of
select="string-length(substring-before($latin1,$first-char)) + 160"/>
              </xsl:when>
              <xsl:otherwise>
                <xsl:message terminate="no">Warning: string 
contains an out of range character.</xsl:message>
                <xsl:text>63</xsl:text>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:variable>
        <xsl:variable name="hex-digit1"
select="substring($hex,floor($charval div 16) + 1,1)"/>
        <xsl:variable name="hex-digit2" 
select="substring($hex,$charval mod
16 + 1,1)"/>
        <xsl:value-of select="concat('%',$hex-digit1,$hex-digit2)"/>
        </xsl:otherwise>
      </xsl:choose>
      <xsl:if test="string-length($str) &gt; 1">
        <xsl:call-template name="encode-url">
          <xsl:with-param name="str" select="substring($str,2)"/>
        </xsl:call-template>
      </xsl:if>
    </xsl:if>
  </xsl:template>


Thanks in advance

Cheers
Trevor



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